A calendar produced by papur bro Llais Ogwen featuring well know people from the area each month. The entry for February shows Goronwy Roberts and his home at the post office.

Photographs of the fragments of a computus and of a calendar which are comprised in Cambridge University Library MS 4543 and which were described by E. C. Quiggin in Zeitschrift für Celtische Philologie, VII, 406-10.

A miscellaneous gathering of papers, some of which have been endorsed by Bishop Humphreys: (a) papers relating to Denbighshire, including extracts from the Survey of 1334 (ff. 3-7); (b) copies of papers relating to the petition (1619) of Thomas Canon, Surveyor of Crown lands in South Wales, concerning the supplanting of the mountain thieves of Wales, and disposing habitations in convenient places (see Calendar of State Papers. Domestic 1619-1623, p. 55) (ff. 8-9); (c) copy of a list of the inhabitants of Anglesey who were amerced for being in arms and rebellion with Owen Glyndyfrdwy, 1406, with a table of the fines, copies of the jury panels, and a list of outlaws (a portion, the lists for the commote of Llivon from a fragment found among Edward Lhuyd's papers, was published in Archaeologia Cambrensis, 3rd ser., 5 (1859), pp. 177-180; Browne Willis, in A Survey of the Cathedral Church of Bangor... (London, 1721), pp. 84-85, quotes from a copy of this record, which he saw in the collection of the then Dean of Bangor) (ff. 61-90); (d) a seventeenth century Welsh calendar (ff. 10-16); (e) 'Catalogus Alphabeticus s[anc]torum Cambrobritannicae', by Bishop Humphreys (ff. 17-22); (f) copies of papers on British Chronology sent by Robert Vaughan of Hengwrt to Archbishop [James] Us[s]her (c.f. NLW MS 3044B) (ff. 23-51).

Llyfr poced, 1665-1689, yn llaw Edward Williams o Lansilin, sir Ddinbych, yn bennaf yn Gymraeg, yn cynnwys deunydd amrywiol megis calendrau, tablau, nodiadau, cyfrifon, barddoniaeth a rhyddiaith.
Mae'r gyfrol yn cynnwys calendr Cymraeg (ff. 57 verso, 58-69), calendrau Saesneg ar gyfer 1667 (ff. 112-117 verso) ac [?1656] (ff. 119 verso-123 verso); tablau ac ysgrifau yn ymwneud ag amseryddiaeth (ff. 24 recto-verso, 41 verso, 47-50, 72 verso-76, 105-108, 110 verso-111 verso, 124 verso-128, Cymraeg yn bennaf); tablau ac ysgrifau tebyg i'r uchod yn ymwneud a sywedyddiaeth a sêr-ddewiniaeth (ff. 45, 46 verso, 53 verso-56 verso, 97-104 verso, Cymraeg); deunydd, yn cynnwys chwe phennill Saesneg, wedi ei gopïo allan o almanac Thomas Jones am 1689 (ff. 57a-d); 128 o englynion, neu bennillion eraill, wedi eu priodoli i Tuder Aled, Gwilim ab Sion Wynn, [Dafydd] Salsbury, Moris ap Ho'll ab Tudur, Maredudd ap Rhys, Sion Mowddwy, Gruffydd Hiraethog, Edward Jeffrey, [Dafydd] ab Edmwnt, [?Gwtwal] Trevor, Ieuan Llwyd Siaffre, Gaynor verch Elissau, Gwenllian verch Rhirid Flaidd ac eraill (tu mewn i'r clawr blaen, ff. i, 1 verso, 2 verso-3, 5 recto-verso, 12 recto-verso, 13 verso-15 verso, 17 verso-18, 23 recto-verso, 25 recto-verso, 26 verso-27 verso, 35 verso-38, 43 verso-46, 50 verso-53, 57a recto-verso, 57b, 69 verso, 72, 73 verso, 75 verso, 76, 87 verso, 109 verso, 119, 124, 129 verso); cyfrifon ynglŷn â threthi eglwysig ('lewne'/'lewn') a threthi eraill ym mhlwyf Llansilin, 1670-1673 (ff. i verso, 2, 7 verso, 9 recto-verso, 38 verso, 39 verso-41, 129 verso; Saesneg); amryw gyfrifon a chofnodion fferm ac aelwyd, 1665-1689 (ff. 3 verso-5, 10 recto-11 verso, 26, 39 recto-verso, 42-43 verso, 70-72, 76 verso-82 verso, 84-86, 87 verso, 89-94, 109, 129; Saesneg); cofnodion genedigaethau, priodasau a marwolaethau yn dyddio o 1659 i 1684 (ff. 6, 7, 17 verso, 39, 51, 108 verso-109, 127; Saesneg); ryseitiau meddygol (ff. 11, 28-35) ac i wneud inc (f. 128 verso); a rhyddiaith, nodiadau ac ysgrifau eraill yn y Gymraeg (ff. 17, 18 verso-22 verso, 56, 85 verso, 86 verso-87, 94 verso-97, 110), yn eu mysg darn o bregeth neu weddi (f. 17), stori Arthuraidd anghyflawn (ff. 18 verso-22 verso) a 'Llyma Hanes Christophis' (ff. 86 verso-87), ac yn Saesneg (ff. 12 verso, 13, 18, 118-119).